Amir Khan believes beating Saul Alvarez would be his biggest achievement in boxing.
The Bolton fighter is moving up two weight divisions to take on Mexican middleweight star 'Canelo' at the MGM Grand.
Khan (31-3-KO19) knows he is the underdog as he attempts to become a world champion again, with Alvarez's WBC title on the line.
I still think winning this fight against such a big name in Canelo, and becoming the middleweight champion, will be bigger than anything I've done.
And despite reaching the pinnacle of the sport as an amateur and a professional, the 29-year-old believes overcoming Alvarez (46-1-1-KO32) will outshine everything.
"It's going to be amazing to be called the middleweight world champion and that's like a dream come true," Khan told Sky Sports.
"Even though I achieved a lot in my amateur days and went to the Olympics and also as a professional becoming a two-weight world champion, I still think winning this fight against such a big name in Canelo, and becoming the middleweight champion, will be bigger than anything I've done."
Khan, who is in camp with trainer Virgil Hunter following a media tour of London, New York and Los Angeles, is ready to follow in the footsteps of Sugar Ray Leonard.
The legendary five-weight world champion moved from welterweight to middleweight to take the WBC world strap from Marvin Hagler back in 1987.
"I know it can happen, because we've seen it happen in the past, when Sugar Ray Leonard took on Marvin Hagler," said Khan.
"He was in a very similar position to me, where people were saying he was going to get beaten up, get knocked out and get hurt. He was going up two divisions and he went in there and beat Marvin Hagler.
"Sugar Ray Leonard was a great, great fighter but I really believe this is going to take me to up to another level."
You can hear more from Amir Khan, along with Shannon Briggs, Anthony Crolla, Kid Galahad, Nathan Cleverly and more in this week's Toe 2 Toe podcast. Available from 5pm, Wednesday.